In vain the latter attempted to check her tendency to swing to starboard by liberal use of the helm. The other tugs, still straining at their task, only made matters worse, until finally the towing craft, unable to check the side strain on her hawser, slewed completely round, and in this position was rammed by the steel prow of the battleship. By this time Billy had manoeuvred for a third attack. So great was the confusion on the German's decks--most of the men who had survived the explosion bolting from their dubious cover that the seaplane was no longer subjected to a peppering from the Archibalds. For years naval architects had been increasing the strength of a battleship's side-armour, while the thickness of the "protected" deck, considered only liable to glancing hits, was kept at about three inches of steel. The present war quickly found the defects of insufficient deck armour. Enormous shells, fired at a range of eighteen thousand yards, fell almost vertically upon the decks of battleships during the Jutland fight, while the menace from bombs dropped from hostile aircraft was only beginning to be realised. Slowing down Barcroft again approached his quarry. This time Kirkwood released three of the high-explosive missiles. Two, fairly close together, by the after 11-inch gun turret, completed the business. With a rush and a roar, indescribably appalling in its titanic power, the battleship's after magazine exploded. The seaplane, whirled like a feather in a hurricane, was enveloped in a cloud of black smoke tinged with flames and mingled with flying fragments from the disintegrated ship. In utter darkness Billy found himself on the underside of the overturned machine. Only the resisting strength of his broad securing strap saved him from being hurled downward like a stone. Almost rendered senseless by the asphyxiating fumes, thrown about as far as the "give" of the strap permitted, his head shaken like a pea in a box, Barcroft was only dimly conscious that the job had been done almost too well. In spite of the danger of his hazardous position he was filled with a sense of elation. The seaplane had scored heavily, and for the present nothing else mattered. Deafened by the thunderous explosion, unable to see a hand's length in front of his face, he was at a loss to ascertain whether the motor was still running or whether the seaplane was engaging in a final tail-spin. Mechanically he grasped the joy-stick. The seaplane was then looping the loop for the third consecutive time. Something--what it was he was unable to ascertain--hit the fuselage with a resounding crash. The lightly-built fabric trembled under the impact. It seemed as if the body of the machine had been ripped asunder. At nearly a hundred miles an hour the seaplane cleared the edge of the drifting smoke. She was then "on an even keel," but about to nose-dive towards the surface of the sea, barely a couple of hundred feet below.